assertEquals("abc", client.invoke("abc"));
log.info("client is connected");
// Add callback handler.
TestInvokerCallbackHandler callbackHandler = new TestInvokerCallbackHandler();
client.addListener(callbackHandler, new HashMap(), null, true);
client.invoke(CALLBACK_TEST);
assertEquals(1, callbackHandler.counter);
log.info("callback handler is installed");
// Verify that "timeout" is used correctly.